QuickView - MAX917, MAX918, MAX919, MAX920 SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

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Description

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The MAX917–MAX920 nanopower comparators in space-saving SOT23 packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX917/MAX918 feature an on-board 1.245V ±1.5% reference and draw an ultra-low supply current of only 750nA, while the MAX919/MAX920 (without reference) require just 380nA of supply current. These features make the MAX917–MAX920 family of comparators ideal for all 2-cell battery applications, including monitoring/management.

The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX917/MAX919 have a push-pull output stage that sinks and sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX918/MAX920 have an open-drain output stage that makes them suitable for mixed-voltage system design.

Key Features

Applications/Uses

Ultra-Low Supply Current
- 380nA per Comparator (MAX919/MAX920)
- 750nA per Comparator with Reference (MAX917/MAX918)
Guaranteed to Operate Down to +1.8V
Internal 1.245V ±1.5% Reference (MAX917/MAX918)
Input Voltage Range Extends 200mV Beyond-the-Rails
CMOS Push-Pull Output with ±8mA Drive Capability (MAX917/MAX919)
Open-Drain Output Versions Available (MAX918/MAX920)
Crowbar-Current-Free Switching
Internal Hysteresis for Clean Switching
No Phase Reversal for Overdriven Inputs
Space-Saving SOT23 Package

	2-Cell Battery Monitoring/Management
	Medical Instruments
	Mobile Communications
	Notebooks and PDAs
	Sensing at Ground or Supply Line
	Telemetry and Remote Systems
	Threshold Detectors/Discriminators
	Ultra-Low-Power Systems

Key Specifications: Comparators

Part Number

Number per Pkg.

Typ Prop. Delay (ns)

Input CMVR to Neg. Rail

Rail to Rail Input

Min. Total Supply (V)

Max. Total Supply (V)

Max. Supply Current per Comp. (µA)

Typ V_OS (mV)

V_OS (max) (mV)

Logic Output

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX919

22000

Yes

1.8

5.5

0.8

CMOS
TTL

SOIC(N)/8
SOT/5

-40 to +85

$0.66 @ 1k

MAX920

Open Drain

$0.66 @ 1k

See All Comparators (83)

Key Specifications: Comparators + Reference
Part Number	Comps. per Pkg.	Threshold (V)	Internal Reference Accuracy (%)	Typ Prop. Delay (µs)	Supply Voltage (min) (V)	Supply Voltage (max) (V)	Max. Total Supply Current (µA)	Prog. Hyst.	Typ V_OS (mV)	V_OS (max) (mV)	Logic Output	Package	Smallest Available Package (max w/pins) (mm²)	Operating Temp. Range (°C)	Price^**
MAX917	1	1.245	1.5	22	1.8	5.5	1.3	No	1	10	TTL/CMOS	SOIC(N)/8 SOT/5	9	-40 to +85	$0.95 @ 1k
MAX918	1	1.245	1.5	22	1.8	5.5	1.3	No	1	10	Open Drain	SOIC(N)/8 SOT/5	9	-40 to +85	$0.95 @ 1k
See All Comparators + Reference (42)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.